A gas-mist coupling skin cooling system for assisting laser skin surgery and its working method

Abstract

The application discloses a kind of auxiliary laser skin surgery gas-mist coupling skin cooling system and working method thereof, so that refrigerant auxiliary skin surgery treatment can be achieved with strong cooling capacity, cooling area controllable, gas nozzle replacement convenient and fast, cooling effect stable and consistent, widely applicable, greatly reduce the operation difficulty of physician, reduce the pain and discomfort of patient, and the use difficulty of skin cooling technology, broaden the application scope of refrigerant flash evaporation spray cooling, environmentally friendly and safe, non-toxic and harmless.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of laser skin medicine, and particularly relates to a gas-mist coupled skin cooling system for assisting laser skin surgery and a working method thereof. BACKGROUND

[0002] The nevus of Ota, wine stain and other skin diseases are caused by abnormal pigmentation in the dermis of the skin. The treatment of skin diseases by using laser is to use the selective photothermal effect of the abnormal pigmentation in the human dermis on laser. However, the normal melanin in the epidermis of the human body will absorb part of the laser energy and dissipate it in the form of heat, causing the patient to have a strong burning and other discomfort during the treatment. The traditional cooling methods such as air cooling, sapphire, agar and the like have the characteristics of insufficient cooling capacity, and are troublesome to use. The refrigerant flash spray has the advantages of high cooling capacity, high spatial and temporal selectivity, and non-toxicity to the human body, making it the most ideal cooling method for laser skin surgery. The jet coupled refrigerant spray not only can reduce the minimum temperature of the spray cooling and enhance the cooling performance, but also can blow off the skin dander generated in the laser surgery. In addition, the impact of the jet on the skin can also distract the patient's attention from the pain, greatly reducing the patient's pain during the treatment. The coaxial jet nozzle can control the spray shape, the tapered nozzle can gather the spray to reduce the spray area, and the straight pipe type nozzle has a spray area between the tapered and the tapered nozzles. The three nozzles can reduce the center temperature of the spray to a certain extent, enhance the heat exchange, reduce the frosting time of the refrigerant spray, reduce the probability of frostbite and discomfort of the patient, and can achieve precise control of the cooling area.

[0003] In addition, the size of the laser spot needs to be adjusted frequently during the clinical treatment of skin diseases due to the type and area of the skin disease, so the cooling area and the cooling area also need to be adjusted in time by replacing different types of jet nozzles. Therefore, the replacement of the jet nozzle should also be convenient and fast. The cooling performance of the refrigerant is sensitive to temperature and pressure, which makes it difficult to unify the spray cooling effect. Stabilizing and controlling the temperature and pressure of the refrigerant is an effective means to solve this problem. Due to the technical limitations, the common skin cooling instrument has the problems of slow response time, low cooling precision, single application, etc. A cooling instrument is mostly used for cooling a specific laser, and cannot be widely used in various scene environments. So far, there is no commercial gas-mist coupled skin cooling device on the market that is convenient and fast to replace, controllable in cooling area, stable and consistent in cooling effect, and widely used. SUMMARY

[0004] To solve the above problems, the application discloses a kind of auxiliary laser skin surgery gas-mist coupling skin cooling system and its working method, so that refrigerant auxiliary skin surgery treatment can be achieved with strong cooling capacity, cooling area controllable, gas nozzle replacement convenient and fast, cooling effect stable and consistent, widely applicable, greatly reduce the operation difficulty of physician, reduce the pain and discomfort of patient, and the difficulty of skin cooling technology, broaden the application scope of refrigerant flash spray cooling, environmentally friendly and safe, non-toxic and harmless.

[0005] The technical scheme adopted by the application is as follows: an auxiliary laser skin surgery gas-mist coupling skin cooling system, comprising a gas-mist coupling system, a quick replacement gas nozzle system without disassembly, a self-stabilizing pressure system, a self-controlled temperature system, and a self-defined control system.

[0006] The gas-mist coupling system includes a handle, a gas-liquid mixed gas channel, a refrigerant liquid path, a jet flow gas path, a refrigerant nozzle, and a jet replacement gas nozzle. The gas-liquid mixed gas channel is located inside the handle. A nitrogen storage tank is connected to the gas-liquid mixed gas channel in the handle through the jet flow gas path. The refrigerant liquid path is connected to the handle and passes through the gas-liquid mixed gas channel coaxially with the gas-liquid mixed gas channel. The refrigerant liquid path is connected to the refrigerant nozzle at the front outlet of the gas-liquid mixed gas channel for delivering refrigerant fluid. The jet replacement gas nozzle is installed at the front end of the handle and nested outside the refrigerant nozzle. The jet flow gas path delivers nitrogen jet flow to the jet replacement gas nozzle.

[0007] The quick replacement gas nozzle system without disassembly includes a base with the same outer diameter as the handle, a rotatable outer ring shell mounted on the base, and a fixed guide rail locking mechanism located inside the outer ring shell and fixed to the base. The fixed guide rail locking mechanism is coaxial with the base and the handle. Three mounting grooves are formed in the fixed guide rail locking mechanism. The three mounting grooves are distributed in a circular pattern relative to the axis. Each mounting groove includes an inner gas nozzle accommodating groove and an outer connecting rod groove. The three gas nozzle accommodating grooves are connected at the axis and axially penetrate the entire base and fixed guide rail locking mechanism at least at the axis.

[0008] The quick replacement gas nozzle system without disassembly further includes a gas nozzle replacement cam mechanism, three jet gas nozzle connecting rods, and three jet replacement gas nozzles. The three jet replacement gas nozzles include one straight pipe type gas nozzle, one tapered type gas nozzle, and one gradually expanding type gas nozzle. Each gas nozzle accommodating groove and connecting rod groove correspondingly mounts one jet replacement gas nozzle and one jet gas nozzle connecting rod. The inner end of the jet gas nozzle connecting rod is fixedly connected to the jet replacement gas nozzle, and the outer end extends radially outside the fixed guide rail locking mechanism.

[0009] The gas nozzle replacement cam mechanism is formed on the inner circumferential surface of the outer ring shell and rotates synchronously with the outer ring shell to drive the jet gas nozzle connecting rod to slide along the connecting rod groove.

[0010] The outlet of the refrigerant nozzle is aligned with and extends into the shaft center of the fixed guide rail locking mechanism, and the base is detachably connected with the front end of the handle.

[0011] The self-stabilized pressure spraying system comprises a nitrogen storage tank, a refrigerant storage tank, a refrigerant storage tank pressure stabilizing and decompressing valve, and a controller.

[0012] The self-temperature control system comprises a refrigerant storage tank bottom pressure transmitter, a refrigerant storage tank top pressure transmitter, a refrigerant storage tank temperature sensor, and a refrigerant storage tank temperature control module, each of which is electrically connected to the controller.

[0013] The refrigerant storage tank upper portion is further provided with a refrigerant storage tank safety valve.

[0014] The jet flow gas path in the handle is provided with a jet flow electromagnetic valve, and the refrigerant liquid path is provided with a refrigerant electromagnetic valve upstream of the refrigerant nozzle.

[0015] The handle shell is provided with a handle trigger switch and a handle emergency stop button, and the jet flow electromagnetic valve, the refrigerant electromagnetic valve, the emergency normally open electromagnetic valve, the handle trigger switch, and the handle emergency stop button are electrically connected to the controller.

[0016] Preferably, the air nozzle replacement cam mechanism is a slide rail type cam structure formed by a thin iron plate arranged on the inner wall of the outer ring shell, and a magnet is arranged on the outer end of the jet flow air nozzle connecting rod to enhance the positioning ability of the jet flow air nozzle connecting rod.

[0017] Preferably, the refrigerant nozzle is a straight pipe type stainless steel nozzle with a length of 20-30 mm and a diameter of 0.8-1 mm, and the refrigerant liquid path selects a hard thin tube with an inner diameter of 2 mm.

[0018] The application also claims a gas-mist coupling skin cooling method for assisting laser skin surgery, which uses the above skin cooling system, and the specific steps are as follows:

[0019] Step one, power on and open the controller, wait for system self-check, check whether the pressure and temperature of each component are normal, open the refrigerant filling port valve, use the vacuum pump to vacuum the refrigerant storage tank, so that the pressure in the tank is lower than atmospheric pressure, add refrigerant through the refrigerant filling port valve, fill nitrogen gas into the nitrogen storage tank to the required pressure through the nitrogen filling valve, and wait for the temperature of the refrigerant storage tank to stabilize to the preset value before use;

[0020] Step two, adjust the refrigerant storage tank pressure stabilizing and pressure reducing valve, so that the pressure in the refrigerant storage tank reaches the required pressure, prevent the pressure change of the refrigerant due to the change of the environmental temperature and the amount of refrigerant, and adjust the jet pressure reducing valve to the required pressure;

[0021] Step three, connect the laser trigger signal with the controller, and the controller automatically controls the spraying time and spraying delay time of the refrigerant spray according to the setting;

[0022] Step four, remove the quick replacement air nozzle system without disassembly, separate the refrigerant nozzle from the jet replacement air nozzle, rotate the air nozzle replacement cam mechanism to select a suitable jet replacement air nozzle, then align the refrigerant nozzle, make the refrigerant nozzle extend into the channel of the selected jet replacement air nozzle, assemble the base and the handle together, and press and seal the jet replacement air nozzle and the gas-liquid mixed gas channel;

[0023] Step five, combine the handle with the laser handle to cool together.

[0024] Further, the control mode of the refrigerant in step three is divided into matching trigger mode and external trigger mode, the matching trigger mode can be used with the cooling device after setting the required pulse width and frequency parameters, and the laser, heat therapy instrument and other devices are used together, so that the laser and the spray are triggered at the same time; the external trigger mode can be triggered or turned off by clicking the handle trigger switch, the handle emergency stop button or the foot-operated emergency normally open electromagnetic valve after setting the pulse width and frequency parameters.

[0025] The beneficial effects of the application are as follows:

[0026] (1) The application uses coaxial jet coupling refrigerant flash spray, which can reduce the minimum temperature of the refrigerant spray, enhance the heat transfer of the refrigerant, shorten the frosting time of the refrigerant spray on the skin surface, and also blow away the skin dander generated during the laser skin surgery process, greatly reducing the discomfort of the patient during the treatment process. Different internal flow channel jet nozzles can control the cooling area and cooling area, and improve the spatial selectivity of the refrigerant cooling.

[0027] (2) The jet nozzle of the present application uses a cam mechanism for replacement, which is more convenient and faster than the traditional disassembly replacement, can quickly adjust the spray according to different laser spot sizes, improves the universality of the technology, and greatly facilitates the real-time control of the cooling area and cooling area by the physician during the treatment process according to the treatment condition.

[0028] (3) The present application has very high precision, and the device can control the cold spray pulse delay time within 6ms, ensure that the cold quantity is accurately and quickly transmitted to the epidermis bottom layer, avoid the treatment layer affected by cooling, and has very high cooling time and space selectivity.

[0029] (4) The present application has very high stability, and the self-stabilizing and self-temperature control functions can make the system achieve consistent cooling effect under different refrigerant reserves and different environmental temperatures, high cooling efficiency and strong system stability.

[0030] (5) The present application has multiple application modes, strong functionality, high personalization and customization ability, and can perform cooling+laser / heat therapy matching trigger mode and external trigger cooling mode according to actual needs, wherein the external trigger mode has handle trigger and foot pedal trigger functions, providing medical personnel with rich and convenient function interfaces, and meeting various refrigeration needs of users in any scene. BRIEF DESCRIPTION OF DRAWINGS

[0031] Figure 1 is the overall frame schematic diagram of the skin cooling system of the present application;

[0032] Figure 2 is the handle part schematic diagram of the skin cooling system of the present application;

[0033] Figure 3 is the disassembly-free quick replacement nozzle structure schematic diagram of the skin cooling system of the present application;

[0034] Figure 4 is the three nozzle structure schematic diagram of the air path jet of the skin cooling system of the present application;

[0035] Figure 5 is the handle part specific embodiment perspective schematic diagram of the skin cooling system of the present application;

[0036] Figure: 1, nitrogen storage tank, 2, nitrogen storage tank safety valve, 3, nitrogen filling port valve, 4, refrigerant storage tank, 5, refrigerant storage tank temperature control module, 6, refrigerant storage tank bottom pressure transmitter, 7, refrigerant storage tank temperature sensor, 8, refrigerant storage tank safety valve, 9, refrigerant storage tank top pressure transmitter, 10, refrigerant storage tank pressure stabilizing pressure reducing valve, 11, nitrogen storage tank pressure transmitter, 12, pressure stabilizing pressure reducing valve pressure transmitter, 13, jet pressure reducing valve, 14, jet pressure reducing valve pressure transmitter, 15, refrigerant filling port valve, 16, emergency normally open solenoid valve, 17, handle, 18, air nozzle replacement cam mechanism, 19, refrigerant nozzle, 20, controller, 21, handle trigger switch, 22, handle emergency stop button, 23, power supply, 24, nitrogen total outlet, 25, jet gas path, 26, refrigerant pressure stabilizing gas path, 27, refrigerant foot pedal trigger switch, 28, refrigerant solenoid valve, 29, jet solenoid valve, 30, gas-liquid mixed gas channel, 31, jet replacement air nozzle, 32, refrigerant liquid path, 33, fixed guide rail locking mechanism, 34, jet air nozzle connecting rod. DETAILED DESCRIPTION

[0037] Reference Figure 1 It is the overall frame schematic diagram of the skin cooling system of the application, which shows a kind of auxiliary laser skin surgery gas-mist coupling skin cooling system, the system includes gas-mist coupling system, quick replacement air nozzle system without disassembly, self pressure stabilizing system, self temperature control system and self-defined control system.

[0038] The gas-mist coupling system includes nitrogen storage tank 1, jet pressure reducing valve 13, jet pressure reducing valve pressure transmitter 14, handle 17, gas-liquid mixed gas channel 30, refrigerant liquid path 32, jet gas path 25, refrigerant nozzle 19, jet replacement air nozzle 31, controller 20;Nitrogen storage tank 1 is communicated to handle 17 via jet gas path 25, jet pressure reducing valve 13 is arranged on jet gas path 25, the jet pressure reducing valve pressure transmitter 14 is installed at jet pressure reducing valve 13, and it is electrically connected to controller 20;The gas-liquid mixed gas channel 30 is arranged in the handle 17, the refrigerant nozzle 19 is located at the front end of handle 17, the refrigerant liquid path 32 is communicated to handle 17 and passes through the gas-liquid mixed gas channel 30 coaxially with the gas-liquid mixed gas channel 30, and the refrigerant liquid path 32 is communicated to the refrigerant nozzle 19 located at the front end of handle 17.

[0039] The quick replacement air nozzle system without disassembly is installed at the front end of handle 17, for realizing the quick replacement of different models of jet air nozzle, see Figure 3The quick replacement nozzle structure of the skin cooling system of the application is shown in the figure, which comprises a nozzle replacement cam mechanism 18, a fixed guide rail locking mechanism 33, a jet replacement nozzle 31 and a jet nozzle connecting rod 34. Figure 4 The quick replacement nozzle structure of the cooling system of the application comprises one of the three types of nozzles. Figure 3 The three jet replacement nozzles 31 are slidably arranged on the fixed guide rail locking mechanism 33. Specifically, the quick replacement nozzle structure comprises a base with the same outer diameter as the handle 17, an outer ring shell rotatably mounted on the base, and a circular truncated cone-shaped fixed guide rail locking mechanism 33 inside the outer ring shell. The fixed guide rail locking mechanism 33 is fixed relative to the base and coaxial with the base and the handle 17. Three mounting grooves are formed on the fixed guide rail locking mechanism 33, which are circumferentially symmetrically distributed relative to the axis. Each mounting groove comprises a nozzle containing groove on the inner side and a connecting rod groove on the outer side. The three nozzle containing grooves are connected at the axis and axially penetrate the entire base and the fixed guide rail locking mechanism 33 at least at the axis. The outlet of the refrigerant nozzle 19 is aligned with and extends into the axis of the fixed guide rail locking mechanism 33, and is in communication with the three nozzle containing grooves. The connecting rod groove is in communication with the nozzle containing groove and the radial outer side of the fixed guide rail locking mechanism 33. The jet nozzle connecting rod 34 is contained in the connecting rod groove, with the inner end fixedly connected to the jet replacement nozzle 31 and the outer end extending out of the radial outer side of the fixed guide rail locking mechanism 33. The inner circumferential surface of the outer ring shell, i.e. the side facing the radial outer side of the fixed guide rail locking mechanism 33, forms the nozzle replacement cam mechanism 18. The base is detachably connected to the front end of the handle 17 by plug-in or screwing. After adjusting the position of the jet replacement nozzle 31 by rotating the outer ring shell circumferentially, the base is buckled or screwed to the front end of the handle 17, and the refrigerant nozzle 19 is aligned and extends into the hollow channel of the jet replacement nozzle 31 located at the axis.

[0040] When the type of jet replacement air nozzle needs to be replaced, the non-disassembly quick replacement air nozzle system is removed, the outer ring shell is manually operated to rotate the air nozzle replacement cam mechanism 18, the air nozzle replacement cam mechanism 18 gradually presses against the jet air nozzle connecting rod 34, the jet air nozzle connecting rod 34 is pressed to slide inward along the connecting rod groove, thereby pushing the jet replacement air nozzle 31 installed in the air nozzle accommodating groove to the axial center and corresponding to the refrigerant nozzle 19, the outer ring shell is rotated again, the air nozzle replacement cam mechanism 18 is rotated, and the other jet air nozzle connecting rod 34 and the jet replacement air nozzle 31 connected with the jet air nozzle connecting rod 34 are gradually pushed to the axial center, and the replacement of different types of jet replacement air nozzles 31 is completed. During the replacement process, the distance between the air nozzle replacement cam mechanism 18 and the jet air nozzle connecting rod 34 gradually increases, and the jet replacement air nozzle 31 located at the axial center is pushed away from the corresponding air nozzle accommodating groove, or a reset spring is installed in the air nozzle accommodating groove or the connecting rod groove to assist the jet replacement air nozzle 31 to move away from the axial center after the shape limiting of the air nozzle replacement cam mechanism 18 disappears.

[0041] Preferably, the air nozzle replacement cam mechanism 18 forms a groove at the apex (not shown in the figure), and the outer end of the jet air nozzle connecting rod 34 is provided in a hemispherical shape. When the outer ring shell is manually rotated, when the outer end of the jet air nozzle connecting rod 34 is rotated to enter the groove of the air nozzle replacement cam mechanism 18, there is a slight sound or a clear hand feeling for the doctor, so as to facilitate the judgment that the jet replacement air nozzle 31 has been located at the axial position.

[0042] The self-stabilized pressure spraying system comprises a nitrogen storage tank 1, a refrigerant storage tank 4, a refrigerant storage tank top pressure transmitter 9, a refrigerant storage tank pressure stabilizing and reducing valve 10, a refrigerant storage tank safety valve 8, a refrigerant filling port valve 15, an emergency normally open electromagnetic valve 16, and a controller 20. The upper end of the refrigerant storage tank 4 is connected to the upstream of the jet pressure reducing valve 13 of the jet gas path 25 through the refrigerant pressure stabilizing gas path 26. The refrigerant storage tank pressure stabilizing and reducing valve 10 is arranged on the refrigerant pressure stabilizing gas path 26. The nitrogen storage tank pressure transmitter 11 and the pressure stabilizing and reducing valve pressure transmitter 12 are arranged at the refrigerant storage tank pressure stabilizing and reducing valve 10 and electrically connected to the controller 20. The refrigerant storage tank safety valve 8 and the refrigerant storage tank top pressure transmitter 9 are arranged on the upper part of the refrigerant storage tank 4. The refrigerant storage tank safety valve 8 ensures the safety of the pressure in the refrigerant storage tank 4. The refrigerant storage tank top pressure transmitter 9 is electrically connected to the controller 20 to detect the pressure in the refrigerant storage tank 4.

[0043] The self-temperature control system comprises a refrigerant storage tank 4, a refrigerant storage tank bottom pressure transmitter 6, a refrigerant storage tank top pressure transmitter 9, a refrigerant storage tank temperature sensor 7, a refrigerant storage tank temperature control module 5, and a controller 20; wherein the refrigerant storage tank temperature control module 5 can be combined by a refrigeration fin and a heating resistance wire; when the cooling system is working, the controller 20 combines the data of the refrigerant storage tank temperature sensor 7, controls the refrigerant temperature in the refrigerant storage tank 4 to be at a preset value through the refrigerant storage tank temperature control module 5. A power supply 23 supplies power for the controller 20 and each electrical component.

[0044] Further, the nitrogen filling port valve 3 and the refrigerant filling port valve 15 are further included, wherein the nitrogen filling port valve 3 controls the filling of nitrogen into the nitrogen storage tank 1, the nitrogen storage tank safety valve 2 is arranged at the outlet of the nitrogen storage tank 1, and the nitrogen storage tank safety valve 2 is connected to the jet flow gas path 25 through the nitrogen total outlet 24; the refrigerant filling port valve 15 controls the filling of refrigerant into the refrigerant storage tank 4.

[0045] Referring to Figure 2 and Figure 5 , they are respectively a schematic diagram of a quick replacement gas nozzle structure of the skin cooling system of the present application and a three-dimensional schematic diagram of a specific embodiment of a handle part of the skin cooling system of the present application, a gas-liquid mixed gas path 30 is arranged inside the handle 17, the jet flow gas path 25 is connected to the gas-liquid mixed gas path 30 after entering the handle 17, the refrigerant liquid path 32 passes through the gas-liquid mixed gas path 30 and is connected to the refrigerant nozzle 19 at the front end, the jet flow electromagnetic valve 29 is arranged on the jet flow gas path 25 in the handle 17, and the refrigerant electromagnetic valve 28 is arranged on the refrigerant liquid path 32 upstream of the refrigerant nozzle 19. A rubber sealing ring is arranged at the front port of the gas-liquid mixed gas path 30, when the jet flow replacement gas nozzle 31 is switched and moves to the axial position, the jet flow replacement gas nozzle 31 corresponds to the position of the gas-liquid mixed gas path 30, and the rubber sealing ring realizes the sealed connection of the flow paths of the two. The handle trigger switch 21 and the handle emergency stop button 22 are arranged on the shell of the handle 17, referring to Figure 1 , the emergency normally open electromagnetic valve 16 electrically connected to the controller 20 is further arranged on the refrigerant liquid path 32, which is preferably a foot-controlled switch, so that the medical staff can step on the emergency normally open electromagnetic valve 16 to make it closed and cut off the refrigerant supply of the refrigerant liquid path 32 to avoid freezing the skin of the operator.

[0046] The nitrogen total outlet 24 at the top of the nitrogen storage tank 1 is connected to two paths through an adapter, one path is for supplying gas to the jet flow gas path 25, and the other path is connected to the refrigerant storage tank 4 through the refrigerant pressure stabilizing gas path 26 to stabilize the pressure of the refrigerant storage tank 4, the two paths are independent of each other and are respectively provided with the jet flow pressure reducing valve 13 and the refrigerant storage tank pressure stabilizing pressure reducing valve 10; the jet flow pressure reducing valve pressure transmitter 14 and the pressure stabilizing pressure reducing valve pressure transmitter 12 are respectively arranged on the two pressure reducing valves, and the working conditions of each path are detected in real time by the controller 20.

[0047] The controller 20 is connected with the refrigerant storage tank temperature sensor 7, each pressure transmitter, each switch of the handle, the foot switch, the refrigerant and the jet electromagnetic valve, sensor data combined with switch signals are processed by the controller and then uniformly act on the refrigerant and the jet electromagnetic valve, so that different spray modes, different trigger modes, emergency stop and refrigerant temperature control functions can be realized; the controller is driven and powered by the power supply 23.

[0048] Preferably, the gas path working medium adopts nitrogen, which is cheap and relatively easy to obtain.

[0049] Preferably, the connection of the gas pipeline adopts high-pressure hose connection, which ensures stable connection and convenient maintenance and installation in the later period.

[0050] Preferably, the jet replacement gas nozzle 311 is of three types of tapered type, straight pipe type and gradually expanded type, and is made of stainless steel.

[0051] Alternatively, the inner wall of the gas nozzle replacement cam mechanism is provided with a thin iron plate to form a slide rail type cam structure, and a magnet is arranged at the top end of the jet gas nozzle connecting rod to enhance the positioning ability of the jet gas nozzle connecting rod 34.

[0052] Preferably, the refrigerant nozzle 19 is a straight pipe type stainless steel nozzle with a length of about 20-30 mm and a diameter of about 0.8-1 mm.

[0053] Preferably, the refrigerant on-off electromagnetic valve and the jet electromagnetic valve can be used for accurate control, and the opening and closing time is less than 6 ms; the refrigerant liquid path 32 selects a hard thin tube with an inner diameter of 2 mm to reduce the evaporation of the refrigerant.

[0054] Preferably, the refrigerant nozzle 19 and the jet replacement gas nozzle 31 are coaxial and share the same center, and the length of the refrigerant nozzle is flush with that of the jet replacement gas nozzle.

[0055] The application also provides a working method of the gas-mist coupling skin cooling system for assisting laser skin surgery, and the specific steps are as follows:

[0056] Step one, power on and open the controller 20, wait for system self-checking, check whether the pressure and temperature of each component are normal, open the refrigerant filling port valve 15, use the vacuum pump to vacuum the refrigerant storage tank 4, so that the pressure in the tank is lower than the atmospheric pressure, which is helpful for filling more refrigerant into the refrigerant storage tank 4; fill the refrigerant through the refrigerant filling port valve 15; fill the nitrogen into the nitrogen storage tank 1 through the nitrogen filling valve 3; because a small amount of refrigerant evaporates during the refrigerant filling process, the temperature in the refrigerant storage tank 4 is relatively low, so it is necessary to wait for the refrigerant storage tank temperature to automatically stabilize to the preset value before use;

[0057] Step two, adjust the refrigerant storage tank pressure reducing valve 10, so that the refrigerant storage tank pressure to the required pressure, to prevent the refrigerant due to changes in ambient temperature and refrigerant volume, adjust the jet pressure reducing valve 13 to the required pressure;

[0058] Step three, the laser trigger signal and the controller 20 connection, the controller 20 according to the settings automatically control the refrigerant spray spray time and spray delay time;

[0059] Step four, remove the quick replacement gas nozzle system, so that the refrigerant nozzle 19 and jet replacement gas nozzle 31 are separated, rotate the gas nozzle replacement cam mechanism 18 to select the appropriate jet replacement gas nozzle 31, and then align the refrigerant nozzle 19, so that the refrigerant nozzle 19 extends into the channel of the selected jet replacement gas nozzle 31, and the base and handle 17 are assembled together, so that the jet replacement gas nozzle 31 is tightly sealed with the gas-liquid mixed gas way 30;

[0060] Step five, the handle 17 and the laser handle are combined to cool together.

[0061] Further, the refrigerant stored in the refrigerant storage tank 4 in step one is any one of R404A, R134a, R410A or R1234yf.

[0062] Further, the negative pressure formed in step one is about 0.02-0.04mpa;

[0063] Further, the refrigerant storage tank pressure reducing valve 10 in step two only needs to be adjusted after replacing different types of refrigerant models, and the jet pressure reducing valve 13 only needs to be adjusted when the jet pressure parameter needs to be changed;

[0064] Further, the control mode of the refrigerant in step three is divided into matching trigger mode and external trigger mode. The matching trigger mode can be used with laser and thermotherapy equipment after setting the required pulse width and frequency parameters, so as to trigger the laser and spray at the same time. The external trigger mode can be triggered or turned off by clicking the handle trigger switch 21, handle emergency stop button 22 or foot type emergency normally open electromagnetic valve 16 on the handle 17 after setting the pulse width and frequency parameters.

[0065] The handle 17 of the refrigerant in the present application can not only be used with laser therapy equipment, but also can be used alone in any scene requiring refrigerant spray cooling.

Claims

1. An auxiliary laser skin surgery gas-mist coupling skin cooling system, comprising a gas-mist coupling system, a quick replacement gas nozzle system without disassembly, a self-stabilized pressure system, a self-controlled temperature system, and a self-defined control system. The gas-mist coupling system comprises a handle (17), a gas-liquid mixed gas channel (30), a refrigerant liquid path (32), a jet gas path (25), a refrigerant nozzle (19), and a jet replacement gas nozzle (31). The gas-liquid mixed gas channel (30) is located inside the handle (17), a nitrogen storage tank (1) is connected to the gas-liquid mixed gas channel (30) in the handle (17) through the jet gas path (25), the refrigerant liquid path (32) is connected to the handle and passes through the gas-liquid mixed gas channel (30) coaxially with the gas-liquid mixed gas channel (30), the refrigerant liquid path (32) is connected to the refrigerant nozzle (19) at the front end outlet of the gas-liquid mixed gas channel (30) for delivering refrigerant fluid; the jet replacement gas nozzle (31) is installed at the front end of the handle (17) and nested outside the refrigerant nozzle (19), and the jet gas path (25) delivers a nitrogen jet stream to the jet replacement gas nozzle (31). The quick replacement gas nozzle system without disassembly comprises a base with the same outer diameter as the handle (17), a rotatable outer ring shell mounted on the base, and a fixed guide rail locking mechanism (33) located inside the outer ring shell and fixed on the base. The fixed guide rail locking mechanism (33) is coaxial with the base and the handle (17), three mounting grooves are formed on the fixed guide rail locking mechanism (33), the three mounting grooves are distributed in a circular symmetric manner relative to the axis, each mounting groove comprises a gas nozzle accommodating groove on the inner side and a connecting rod groove on the outer side, the three gas nozzle accommodating grooves are connected at the axis and axially penetrate through the entire base and the fixed guide rail locking mechanism (33) at least at the axis. The quick replacement gas nozzle system without disassembly further comprises a gas nozzle replacement cam mechanism (18), three jet gas nozzle connecting rods (34), and three jet replacement gas nozzles (31). The three jet replacement gas nozzles (31) include one straight pipe type gas nozzle, one tapered type gas nozzle, and one expanding type gas nozzle. Each gas nozzle accommodating groove and connecting rod groove correspondingly mount one jet replacement gas nozzle (31) and one jet gas nozzle connecting rod (34). The inner end of the jet gas nozzle connecting rod (34) is fixedly connected to the jet replacement gas nozzle (31), and the outer end extends outward of the radial direction of the fixed guide rail locking mechanism (33). The gas nozzle replacement cam mechanism (18) is formed on the inner circumferential surface of the outer ring shell and rotates synchronously with the outer ring shell to drive the jet gas nozzle connecting rod (34) to slide along the connecting rod groove. The outlet of the refrigerant nozzle (19) is aligned with and extends into the axis of the fixed guide rail locking mechanism (33), and the base is detachably connected to the front end of the handle (17).

2. The skin cooling system of claim 1, further characterized by, It also includes a self-stabilizing pressure spraying system; the self-stabilizing pressure spraying system includes a nitrogen storage tank (1), a refrigerant storage tank (4), a refrigerant storage tank pressure stabilizing and reducing valve (10), and a controller (20); the nitrogen storage tank (1) supplies nitrogen for a jet gas path (25), and the nitrogen storage tank (1) is communicated to the refrigerant storage tank (4) through a refrigerant pressure stabilizing path (26), and the nitrogen pressure of the nitrogen storage tank (1) is used for stabilizing the pressure of the refrigerant storage tank (4); the refrigerant storage tank pressure stabilizing and reducing valve (10) is arranged on the refrigerant pressure stabilizing path (26), and the refrigerant storage tank pressure stabilizing and reducing valve (10) is further provided with a nitrogen storage tank pressure transmitter (11) and a pressure stabilizing and reducing valve pressure transmitter (12), both of which are electrically connected to the controller (20).

3. The skin cooling system of claim 2, further characterized by, It also includes a self-control temperature system, the self-control temperature system includes a refrigerant storage tank bottom pressure transmitter (6), a refrigerant storage tank top pressure transmitter (9), a refrigerant storage tank temperature sensor (7), and a refrigerant storage tank temperature control module (5), and each component is electrically connected to the controller (20); wherein the refrigerant storage tank temperature control module (5) is combined by a refrigeration fin and a heating resistance wire, and when the cooling system works, the temperature of the refrigerant in the refrigerant storage tank (4) is controlled to be at a preset value through the refrigerant storage tank temperature control module (5).

4. The skin cooling system of claim 3, further characterized by, The upper part of the refrigerant storage tank (4) is further provided with a refrigerant storage tank safety valve (8).

5. The skin cooling system of claim 1, further characterized by, The jet flow pressure reducing valve (13) is arranged on the jet flow path, and the jet flow pressure reducing valve pressure transmitter (14) is arranged at the jet flow pressure reducing valve (13).

6. The skin cooling system of claim 3, further characterized by The jet flow electromagnetic valve (29) is arranged on the jet flow path (25) in the handle (17), and the refrigerant electromagnetic valve (28) is arranged on the refrigerant liquid path (32) upstream of the refrigerant nozzle (19); the emergency normally open electromagnetic valve (16) is further arranged on the refrigerant liquid path (32) upstream of the handle (17); The handle trigger switch (21) and the handle emergency stop button (22) are arranged on the handle (17) shell, and the jet flow electromagnetic valve (29), the refrigerant electromagnetic valve (28), the emergency normally open electromagnetic valve (16), the handle trigger switch (21) and the handle emergency stop button (22) are electrically connected to the controller (20).

7. The skin cooling system of claim 1, further characterized by, The gas nozzle replacement cam mechanism is a slide rail type cam structure formed by a thin iron plate arranged on the inner wall of the outer ring shell, and a magnet is arranged on the outer end of the jet gas nozzle connecting rod to enhance the positioning ability of the jet gas nozzle connecting rod; and / or, The gas nozzle replacement cam mechanism (18) forms a groove at the top point, the outer end of the jet gas nozzle connecting rod (34) is arranged in a hemispherical shape, and the jet gas nozzle connecting rod (34) can be clamped into or moved out of the groove with the rotation of the gas nozzle replacement cam mechanism (18).

8. The skin cooling system of claim 3, further characterized by, The refrigerant nozzle (19) is a straight pipe type stainless steel nozzle with a length of 20-30 mm and a diameter of 0.8-1 mm; the refrigerant liquid path (32) selects a hard thin pipe with an inner diameter of 2 mm.

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